Lantern



' Nov. 10, 1931.

H. w. BISHOP LANTERN Filed March 11, 1930 2 Sheets-Sheet 1 I I 28 v 26 9A Z/ i Z0 I g i INVENTOR. flow/lea fl/fi/sfiop ATTOR EY;

NOV. 10, 1931. H, w, s oP I 1,831,090

LANTERN Filed March 11. 1 2 Sheets-Sheet 2 Illlllii INVENTOR.

ATTORNEYS.

Patented Nov. 10, 1931 UNITED STATES nowaan w. mentor, or L cemroemLANTERN Application filed. March 11, 1930. 'SeriaiNo. 434,878.

My invention relates to lanterns of that ype hav ng a mu ti ol re screenhich is movable in respect to a source of light for changing the colorof the rays projected.

5 It is a purpose. of my invention to provide a lantern of the abovedescribed type which is operable to produce new and pleasing spectacularlighting effects. 1

It is also a purpose of my invention to prool' rvide' a lantern whichembodies a multicolored and tubular screen with a source of I lightexteriorly of the screen, and reflectors associated with the lightsources and screen by which the light rays emanating from said sourcesare first projected through the screen and then outwardly thereof, thereflectors serving to reflect and concentrate'the light rays in a mannerto intensify the resultant light projected from the lantern, and thescreen being rotatable to effect variable color ing of the light raysprojected.

I will describe only one form of lantern embodyingmy invention and willthen point :out the novel features thereof in claims:

In the accompanying drawings:

Fig. 1 is a view showing in vertical section one form of lanternembodying my inventionxwith a driving means for the screen thereof inelevation.

Fig. 2 is a view showing the lantern in rear elevation and with aportion of the casing for the driving means broken away to discloseparts not otherwise revealed.

' Fig. 3 is a transverse'sectional view taken on the line 33 of Fig. 1.

In carrying out my invention, I provide a housingiHtof a form. toaccommodate the component parts of the lantern, and as in thisembodiment of my invention a single screen and two lamps are employed,the

housing is constructed of triangular form to provide a substantiallycircular central portion 15,:and lateral portions 16 disposed at Idiametrically opposed points with respect to the central portion toaccommodate the two la p an he refle thwhich t ey re associated. Thefront side of the housing is formed with an opening 17 in the centralportion 15, and a lens 18 closes this opening, and through which lensthe light rays of the lantern are adapted to be pr jfic ed. At the rearside of the housing and centrally with respect to the opening 17 is asmall p ng 1 i h h a sha 2 i otatably titted, this wall of the housingbeing separately formed from the remainder of the housing and detachablysecured thereto by means of screws in order that access may be had tothe housing in assembling and disassembling the component parts of thelantern. 1

As illustrated to advantage in Fig. 1, that portion of the shaft 20extending into the ousing H has secured thereto, by means of a set screw21, a head 22 the forward side of which is of concave form-and hassecured thereto a reflector 23 which, in the present instance, is ofparabolic form. At the perimeter of the'reflector 23 is secured an annulus 24, while secured to the annulus is the rear end of a color screenS, the forward end of the color screen being reinforced by a secondannulus 25.

The color screen S is made up of segmental sections or panels of coloredand translucent material, and as in this embodiment of my invention Iemploy two sources of light, and to combine the light rays therefrom inproducing light of one or a number of given colors, those panels whichare diametrically opposed are of the same color. It

is to be understood however, that diametrically opposed panels may be ofunlike colors in order to produce a third color of the'rays projectedfrom the lantern.

As illustrated to advantage in Fig. '1, the lateral portions 16 of thehousing each contain an elongated reflector R which is secured in fixedposition within the housing in any suitable manner, such as by'arms 26.

This reflector is of substantially tubular form except that its innerside is cut away as best illustrated in Fi 3 in order to ac comm-odatethe screen but primarily to permit the projection of light rays throughthe panels of the screen. The rear end of the reflector is closed by atransverse wall 26*, the inner side of which is mirrored to form areflecting surface, and this wall is formed with an opening 26 in whicha lamp socket 27 is secured to receive an electric lamp 28 which isdisposed within the tubular reflector. The forward end of the-reflectoris rounded as indicated at 29, and in such manner that its reflectingsurface is positioned to reflect light rays emanating from the lamp 28outwardly of the opening 26*, inwardly through the screen S, andrearwardly thereof in the general direction of the reflector 23.

It will of course be understood that certain of the rays emanating fromthe lamp 28 are projected directly through the panels of the screen onto the reflector 23, and other rays are reflected from thetubular'surface of the reflector through the screen and in advance ofthe reflector 23. In constructing the reflector 23 of parabolic form,the major portion of the rays emanating from both of the lamps 28 arereceived and projected laterally through the screen S and a portion ofwhich will ultimately be projected through the lense 18.

In practice, the screen S is adapted to be slowly rotated by means ofthe shaft 22 in order to successively present the panels of the screento the openings of the reflectors R in order that the rays emanatingfrom the lamps 28 will be projected through the panels and thus becolored by the latter. Consequently, the rays as projected through thelens 18 and by the reflector 23 are controlled as to color by the colorof the panels exposed to the lamps. As opposed panels are of like color,all light rays projected through companion panels are of the same color,and hence the light rays combine to produce a beam projected from thelantern by the projector 23. By rotation of the screen the coloredpanels successively pass the reflectors R, and in so doing change thelight beam from one color to another, there being a pering the change byreason of the fact that there is an intermixing of the rays projectedthrough portions of adjacent and different colored panels. For example,as apanel of one color is passing from the illuminating influence of theadjacent lamp 28, the succeeding panel is passing into the illuminatedposition occupied by the first panel, so that portions of both of thepanels are illuminated simultaneously. As'aconsequence, the light raysprojected through these two differently colored panel portions areprojected into the interior of the screen and against the reflector 23where they combine with like colored rays projected from the other lamp28 and through correspondingpanel portions, and with the net result of aperfect blending of all of the rays as projected forwardly through thelens 18. It will of course be understood that the predominating color ofthese rays as projected constantly changes until the complete succeedingpanel has passed completely into position before the lamp, when theprojected rays assume a single color corresponding to that of therespective screen panel. Thus there is eliminated an abrupt change incolor of the light beam projected from the lantern as the screen isrotated, and

instead there is effected a blending of one color into another toproduce a lighting effect which is artistic and spectacular.

vThe shaft may be rotated in any suitable manner, and in the presentinstance I employ a motor M, the shaft 30 of which is operatively'connected to a worm wheel 31 by means of a worm 32. The worm wheel 31 isfixed to the shaft 20, as illustrated in Fig. 2, and consequently whenthe motor is energized the shaft 30 is operated to effect rotation ofthe screen S and the reflector 23 by means of the shaft 20. Through theme dium of the worm and worm wheel, rotation of the motor is reduced inits transmission to the screen S and, as a consequence, slow rotation ofthe screen is produced to effect the successive movement of its panelsacross the openings of the reflectors R.

Although I have herein shown and described only one form of lanternembodying my invention, it is to be understood that various changes andmodifications may be made herein without departing from the spirit ofthe invention and the spirit and scope of the appended claims.

I claim:

1. A lanterncomprising a multi-colored and tubular screen mounted forrotation, a reflector at oneend of the screen for projecting light raysforwardly from the tube formed by the screen, a stationary lamppositioned exteriorly of the screen and projecting light rays through atleast a part of the screen, and means for rotating the screen to presentdifferent parts thereof to the lamp. fect blending of one color intoanother dur- 2. A lantern comprising a multi-colored and tubular screenmounted for rotation, a reflector at one end of the screen forprojecting light rays forwardly through the screen, a stationary lamppositioned exteriorly of the screen and projecting light rays through atleast a part of the screen, a second reflector exteriorly of the screenand positioned with respect to the lamp to reflect rays projectedthereon from the lamp through the screen and onto the first reflector,and means for rotating the screen to present different parts thereof tothe lamp and between the two reflectors.

3. A lantern comprising a multi-colored and tubular screen mounted forrotation, a plurality of lamps positioned exteriorly of the screen so asto project their rays through parts of the screen, means for rotatingthe screen to present different parts thereof successively to the lamps,and a reflector positioned with respect to the screen to reflect lightrays projected thereagainst outwardly of the screen.

4. A lantern comprising a multi-colored and tubular screen mounted forrotation, a lamp exteriorly of the screen for projecting rays through atleast a part of the screen, means for rotating the screen to presentdifferent parts thereof successively to the lamp, and a reflector sopositioned with respect to the screen as to reflect light rays projectedthrough the screen forwardly and outwardly of the screen. 7

5. A lantern comprising a tubular screen having segmental panels ofVarious colors but those panels diametrically opposed of the same color,means for mounting said screen for rotation about its major axis, a pairof lamps disposed exteriorly of the screen and at diametrically opposedpoints in respect thereto, a reflector for reflecting light raysprojected through the screen forwardly and outwardly of the screen, andmeans for rotating the screen.

6. A lantern comprising a tubular screen having segmental panels ofvarious colors but those panels diametrically opposed of the same color,means for mounting said screen for rotation about its major axis, a pairof lamps disposed exteriorlyof the screen and at diametrically opposedpoints in respect thereto, a reflector for reflecting light raysprojected through the screen forwardly and outwardly of the screen, andreflectors associated with the lamps for concentrating the raystherefrom so that they are caused to be projected through the screen andin the general direction of the first reflector.

7. A lantern comprising a housing, a shaft journaled in the housing, areflector secured to the shaft, a tubular screen secured to andsurrounding the reflector and made up of a plurality of segmental panelsof various colors, said reflector and screen being disposed within saidhousing, a lamp within the housing and exteriorly of the reflector forprojecting light rays through the reflector, and

means connected to said shaft for rotating the latter whereby the screenis rotated to pre sent different panels successively to the lamp.

8. A lantern as embodied in claim 7 wherein a reflector is associatedwith the lamp and disposed within the housing for concentrating the raysfrom said lamp in the general direction of the first reflector.

9. A lantern comprising a housing, a shaft journaled in the housing, aparabolic reflector secured to the shaft and disposed within thehousing, a tubular screen secured to the re-- shaft.

HOWARD W. BISHOP.

